What is a Prover?
A Prover is a device with a “known traceable volume” designed to calibrate or prove a liquid flow meter’s accuracy and repeatability under actual operating conditions. Provers can be stationary or portable devices used to calibrate and verify the accuracy and repeatability of both volumetric and mass flow meters. Provers are commonly used in the hydrocarbon industry for custody transfer or fiscal applications, where accuracy is critical.
A Prover Establishes:
- The K-Factor (pulses per unit volume) of a meter
- The Meter Factor (factor used with a meter to correct accuracy for flow conditions)
- The Linearity over the calibrated flow range for the meter
- The repeatability for the meter system